Feed-adjusting device for the cross-slides of metal-working machines.



UNITED STATES PATENT OFFICE.'

.BENGT M. w; Hassox, or HARTFORD', coaXEoTIcUT, AssicNoR To PRATT a WHITNEY COMPANY, or HARTFORD, coivrnoriocr, A coRPoRATIoX or NEwJERsEY.

Speccation of Letters Patent.

Patented March 6` 1906.

Application filed December 19, 1904. Serial No. 237,545.

To all whom it may concern;

Be it lmown that I, BENGT M. W. H aNsoN, a citizen of Sweden, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Feed-Adj usting Devices for the Cross-Slides of Metal-Working Machines. of which the following is a specication.

invention relates to devices for controlling the feed movement of a cross-slide in .such a way that the tool maybe set to an exact point and maybe returned to said point, thereby enabhng the work of adjustment to be accomplished in a quick and reliable man-l ner withoutthe usual prolonged delay.

While the invention may be applied to the feed-screw of a cross-slide of any metal-working machine, it is shown employed with the screw for actuating the cross-slide of a threadmilling machine, said slide carrying a driven shaft upon which the threadcutting tool is mounted.

Primarily the ob'ect of the invention is t-he revision of an a justable stop which will 't the extent to which the screw for actuating t'he cross-slide may be turned and .will positively prevent the entrance of the tool into the Work beyond a certain point, whereby the work may be cut to predetermined depth and no farther and precisionized replicas of said work may be accurately pro.- duced. l

A further obj ect of the invention is the provision, in connection with the cross-slide screw, of stop and gaging devices under control of the mechamc, .so that a thread of any desired depth mav be produced and'exact-A duplicates of said thread formed.

Other objects of the invention will hereinafter be set forth.

In the accompanying' drawings, Figure 1 is a plan view of the cross-slide, partly broken away, of a metal-working mac ine, showing the'screw and my invention. applied to said screw. 2 is a view parta ly in longitudinal vertical section online 2 2 of Fig. 1. 3 is a longitudinal vertical section on line may readily be 2 33'0f Fig. 1. F'j. 4 is a front elevation of the improved stop evice with the hand-wheel removed, and 5 is a perspective view of the s lit'gage-rmg. Lilib numerals designate similar parts throughout lthe several views.

Referring .to the drawings, the numeral l deslgnates the bed ofa metal-working machine; 2, the cross-slide thereof; 3. the feedscrew; 4, the nut in which said feed-screw works. and 5 the hand-wheel by which the screw is turned, all of these parts being of usual construction.

Designated generally by 6 is a tubular bearing for the cross-slide screw, said bearing beingr inserted at one end in an openingr of the carriage; and secured to said carriage by bolts passing through a flange 8 thereof. Beyond said flange 8 the bearing is enlarged to form a barrel 9, terminating at its end in a plate 10, said plate being provided with an extension 11 for a purpose hereinafter mentioned.

Rising from the cross-slide 2 are bearingstandards 12 (one being illustrated) for the reception of the trunnions (not shown) of an angularly-adjustable frame 13, in which is journaled a shaft 14, carrying amilling-cutter 15, employed in threading work 16, which is to be supported and rotated in the usual way.

Plate 10 of bearing 6 is provided with a zero-mark 1T to cooperate with a split ring 1S, having a graduated surface 19 and a knurled eriphery 20, adjacent to said graduated su ace.

Keyed to the feed-screw shaft 3 adjacent to plate 10 is a head or carrier 21, having a circumferential T-shaped groove 22, and on a reduced part of this head adjacent to. the

. plate 10 the graduated 18 is mounted for arcuate adjustment, as shown in Figs. 1 and 2, said ring in virtue of its yielding character being held normallv stationary on the carl'ier, but being capable of adjustment around the same. Fitted in the circumferentialgroove 22 of carrier 21 is the T-sha ed head of a bolt 2,4, a flange of the carrier eing T grooved fat25 to permit of the entrance of said bolt. Loose on the bolt is a shoe 26, concave on its under side to lit the periphery of the head, and engaging the thread of said bolt is a nut 2T, shown. as a capstan-nut, although any other form of nut may be emploved.

Projecting on each side of extension 11 of plate 10 is a tubular bearing 2S for the reception of a movable stop 29, having a beveled front end 29'." This stop\29 is provided with V-shaped notches 30 31 for the reception of the end ofa detent 32.normallyforced toward the stop by a spring 33, located in a chamber IOO of the bearing and the tension of which may be regulated by a screw 34.

.the operation of the inventionv the screwv graduatedv surface of the ring. vFurther moltionof the screw is now. arrested, the nut 27 is loosened, and-- said nut, the bolt '24, andV shoe 26' are adjusted over thesur'ace of the .15 carrier 21, the T- head of the bolt slidin in i .'jtliecircumferential groove :22 until'thes oe engages theinner 'at side 'of the movable Step 2 9, when the-nut is tightened to `clamp the' parts rigidly in place. Nowby retract- 'zo ingr-*the Q screvvfthe cross-slide will be withdrawn', and when the shoe 26 engages .the beveledend 29 of the sto 29 said 'stop 29 will lie Eorced back until the etent 32 snaps intoA the. notch lthereof, and thus retains it in 25 )withdrawn position. To set lthe parts for producingfa precisionized duplicate'of the Wor k,zthe screw is again manipulated as beforeuntil the cutting-surface of thetool touches the lnew Work, and the' stop 29 is,

goffpushed in until the detent snaps into 'notch 30 of said stop, thusfholding it in projected position to forma-positive abutment for limiting the advance of the cross-slide and its tool in the manner before described. In this 3S.A Way exact. duplicates .(no calipering being f necessary) of any. Work desired. may be y*.foi-"med'in milling, turning, and other metal- Working machines, the invention not being limited in use to the machine described.

Various changes may .be made in-theconstructional details of the parts, the invention not being limited to the precise devices shown and described.

Havingthus described my'mvention, what l. The combination, vwith a support, and

'With a slide'thereon, of afscrew for actuating einem saidslide; a bearing projectingfrom the.y sup-- ead provided port, said bearing having. a V with a graduation; a carrier connected to thev screw; a stop adjustable circumferentially of said carrier; and a graduated ring also adlocated adjacent to the head ofthe bearing. 2. The combination, with .a support, and

ustable circumferentially of the carrier, andwith a slide movable thereon,fof a tubularv ybearing projecting from the sup ort, andl having a head provided With agra uation; a carrier rigid with the barrel ofthe screw adj a- I cent toi said head; a graduatedring adjustable circumferentially of the carrier; ajstopalso. adjustable circumferentially ofy the -carrier; `and fa movable stop carried by the head,

and coperating with the stop ofthe carrier.

. f1'. The combination, with a support, 'of a bearin havingan indicating-mark; a screvT j ourna ed in said bearing.; a slideon the supl ort, and actuated bythe screiv'; va grooved eadv rigid with the screw; a .split ring adjustable-circumferentially of the head, saidring being graduated; a stop adjustable `in 'the groove of the head; and a stop slidably mounted on the bearing.

4. The 'co1nbination,-With a support, of a crossslide thereon; ascrew for actuating said cross-slide afbearing rojecting from the support,1and in which te barrel of the screw is journaled, said bearing having -a plate'at its outer end provided With an indicating-mark; a bearing projecting from the plate; a pin provided with'notches and having'an inclined end mounted forsliding movement in the bearing of the. late.; adetent for engaging the notches and ocking the pin; a graduated split ring; a head rigid With the barrel of the screw, and over which said split -ring is adjustable; and a stop'circumferentially adjustable on the head.

In testimony whereof I affix my 4signature in presence of two witnesses.

`BENGr'i M. W; HANSON-` Witnesses:

j KATE. T. M. OCONNELL, JOSEPH W. ANDREWS. 

